Network mode selection based on positioning system information blocks

ABSTRACT

Techniques are provided for network mode selection based on positioning system information blocks (SIBs). An example method for measuring positioning reference signals with a user equipment includes receiving one or more system information blocks containing positioning reference signal information, determining band and frequency information for positioning reference signals based on the one or more system information blocks, determining at least one operational constraint for the user equipment, determining a network mode for the user equipment based at least on the band and frequency information and the at least one operational constraint, and measuring one or more positioning reference signals based at least in part on the network mode.

BACKGROUND

Wireless communication systems have developed through various generations, including a first-generation analog wireless phone service (1G), a second-generation (2G) digital wireless phone service (including interim 2.5G and 2.75G networks), a third-generation (3G) high speed data, Internet-capable wireless service, a fourth-generation (4G) service (e.g., Long Term Evolution (LTE) or WiMax), and a fifth generation (5G) service (e.g., 5G New Radio (NR)). There are presently many different types of wireless communication systems in use, including Cellular and Personal Communications Service (PCS) systems. Examples of known cellular systems include the cellular Analog Advanced Mobile Phone System (AMPS), and digital cellular systems based on Code Division Multiple Access (CDMA), Frequency Division Multiple Access (FDMA), Time Division Multiple Access (TDMA), the Global System for Mobile access (GSM) variation of TDMA, etc.

It is often desirable to know the location of a user equipment (UE), e.g., a cellular phone, with the terms “location” and “position” being synonymous and used interchangeably herein. A location services (LCS) client may desire to know the location of the UE and may communicate with a location center in order to request the location of the UE. The location center and the UE may exchange messages, as appropriate, to obtain a location estimate for the UE. The location center may return the location estimate to the LCS client, e.g., for use in one or more applications.

Obtaining the location of a mobile device that is accessing a wireless network may be useful for many applications including, for example, emergency calls, personal navigation, asset tracking, locating a friend or family member, etc. Existing positioning methods include methods based on measuring radio signals transmitted from a variety of devices including satellite vehicles and terrestrial radio sources in a wireless network such as base stations and access points. Stations in a wireless network may be configured to transmit reference signals to enable mobile devices to perform positioning measurements. The reference signals may vary based on the configuration of the wireless communication system, and a mobile device may be configured to operate with one or more wireless communication systems.

SUMMARY

An example method for measuring positioning reference signals with a user equipment according to the disclosure includes receiving one or more system information blocks containing positioning reference signal information, determining band and frequency information for positioning reference signals based on the one or more system information blocks, determining at least one operational constraint for the user equipment, determining a network mode for the user equipment based at least on the band and frequency information and the at least one operational constraint, and measuring one or more positioning reference signals based at least in part on the network mode.

Implementations of a such a method may include one or more of the following features. A location of the user equipment may be determined based at least in part on measurements associated with the one or more positioning reference signals. Determining the location of the user equipment may include providing measurements associated with the one or more positioning reference signals to a network server. The at least one operational constraint may be based on a number of measurement gaps required to measure the one or more positioning reference signals. The at least one operational constraint may be based on a thermal constraint associated with utilizing additional processor power to measure the one or more positioning reference signals. The at least one operational constraint may be based on a conflict between functions associated with two different subscriptions in a multiple subscriber identity module (MSIM) mode. Measuring the one or more positioning reference signals may include measuring a first positioning reference signal from a first base station and measuring a second positioning reference signal from a second base station wherein the first positioning reference signal and the second positioning reference signal are in different frequency bands. The first base station may utilize a first technology and the second base station may utilize a second technology that is different from the first technology. The first technology may be Long Term Evolution and the second technology may be New Radio Frequency Range 1. Determining the network mode for the user equipment may include selecting a band for measuring the one or more positioning reference signals based at least in part on a number of measurement gaps associated with the band, such that the selected band has a fewer number of measurement gaps as compared to other possible bands. Determining the network mode for the user equipment may include setting the network mode to Long Term Evolution or New Radio Frequency Range 1 if the user equipment supports Evolved Universal Mobile Telecommunications System Terrestrial Radio Access and New Radio Dual Connectivity. Determining the network mode for the user equipment includes setting the network mode to New Radio Frequency Range 1 if the user equipment does not supports Evolved Universal Mobile Telecommunications System Terrestrial Radio Access and New Radio Dual Connectivity. Determining the network mode for the user equipment may include setting the network mode to New Radio if the user equipment supports New Radio Evolved Universal Mobile Telecommunications System Terrestrial Radio Access Dual Connectivity. Determining the network mode for the user equipment may include setting the network mode to Long Term Evolution if the user equipment does not supports New Radio Evolved Universal Mobile Telecommunications System Terrestrial Radio Access Dual Connectivity. Determining the network mode for the user equipment may include setting the network mode to Long Term Evolution or New Radio Frequency Range 1 if the user equipment supports New Radio Frequency Range 1 and New Radio Frequency Range 2 Dual Connectivity. Determining the network mode for the user equipment may include setting the network mode to Long Term Evolution if the user equipment supports Long Term Evolution Frequency Range 2 Evolved Universal Mobile Telecommunications System Terrestrial Radio Access and New Radio Dual Connectivity.

An example apparatus according to the disclosure includes a memory, at least one transceiver, at least one processor communicatively coupled to the memory and the at least one transceiver, and configured to receive one or more system information blocks containing positioning reference signal information, determine band and frequency information for positioning reference signals based on the one or more system information blocks, determine at least one operational constraint, determine a network mode based at least on the band and frequency information and the at least one operational constraint and measure one or more positioning reference signals based at least in part on the network mode.

Implementations of such an apparatus may include one or more of the following features. The at least one processor may be further configured to determine a location based at least in part on measurements associated with the one or more positioning reference signals. The at least one processor may be further configured to provide measurements associated with the one or more positioning reference signals to a network server. The at least one operational constraint may be based on a number of measurement gaps required to measure the one or more positioning reference signals. The at least one operational constraint may be based on a thermal constraint associated with utilizing additional processor power to measure the one or more positioning reference signals. The at least one operational constraint may be based on a conflict between functions associated with two different subscriptions in a multiple subscriber identity module (MSIM) mode. The at least one processor may be further configured to measure a first positioning reference signal from a first base station and measure a second positioning reference signal from a second base station wherein the first positioning reference signal and the second positioning reference signal are in different frequency bands. The first base station may utilize a first technology and the second base station utilizes a second technology that is different from the first technology. The first technology may be Long Term Evolution and the second technology is New Radio Frequency Range 1. The at least one processor may be further configured to determine a band for measuring the one or more positioning reference signals. The at least one processor may be further configured to set the network mode to Long Term Evolution or New Radio Frequency Range 1 if the user equipment supports Evolved Universal Mobile Telecommunications System Terrestrial Radio Access and New Radio Dual Connectivity. The at least one processor may be further configured to set the network mode to New Radio Frequency Range 1 if the apparatus does not supports Evolved Universal Mobile Telecommunications System Terrestrial Radio Access and New Radio Dual Connectivity.

An example apparatus for measuring positioning reference signals with a user equipment according to the disclosure includes means for receiving one or more system information blocks containing positioning reference signal information, means for determining band and frequency information for positioning reference signals based on the one or more system information blocks, means for determining at least one operational constraint for the user equipment, means for determining a network mode for the user equipment based at least on the band and frequency information and the at least one operational constraint, and means for measuring one or more positioning reference signals based at least in part on the network mode.

An example non-transitory processor-readable storage medium comprising processor-readable instructions configured to cause one or more processors to measure positioning reference signals with a user equipment according to the disclosure includes code for receiving one or more system information blocks containing positioning reference signal information, code for determining band and frequency information for positioning reference signals based on the one or more system information blocks, code for determining at least one operational constraint for the user equipment, code for determining a network mode for the user equipment based at least on the band and frequency information and the at least one operational constraint, and code for measuring one or more positioning reference signals based at least in part on the network mode.

Items and/or techniques described herein may provide one or more of the following capabilities, as well as other capabilities not mentioned. A mobile device may receive assistance data including frequency and band information for positioning reference signals. The positioning reference signals may utilize different bands and different radio access technologies. The mobile device may be configured to enable different network modes to receive signals on different bands and with different technologies. The mobile device may select a mode based on the information in the assistance data. The network mode may also be selected based on an operational constraint such as reducing measurement gaps and thermal load. The network mode selection may reduce latency in a positioning session and reduce power consumption within the mobile device. Other capabilities may be provided and not every implementation according to the disclosure must provide any, let alone all, of the capabilities discussed.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a simplified diagram of an example wireless communications system.

FIG. 2 is a block diagram of components of an example user equipment shown in FIG. 1 .

FIG. 3 is a block diagram of components of an example transmission/reception point shown in FIG. 1 .

FIG. 4 is a block diagram of components of an example server shown in FIG. 1 .

FIGS. 5A and 5B illustrate example downlink positioning reference signal resource sets.

FIG. 6 is an illustration of example subframe formats for positioning reference signal transmission.

FIG. 7 is a conceptual diagram of an example frequency layer.

FIG. 8 is an example message flow for a time of arrival based position estimate.

FIG. 9 is an example round trip time message flow between a user equipment and a base station.

FIG. 10 is an example message flow for passive positioning of a user equipment.

FIG. 11 is a timing diagram of an example measurement gap.

FIG. 12 is a conceptual diagram of network mode selection based on positioning system information blocks.

FIG. 13 is a process flow for an example method for positioning a mobile device with network mode selection.

FIGS. 14A and 14B are process flows for an example method for network mode selection based on positioning system information blocks.

DETAILED DESCRIPTION

Techniques are discussed herein for network mode selection based on positioning system information blocks (SIBs). Wireless communication systems may utilize a variety of positioning methods such as time of arrival (ToA) based on downlink (DL) reference signal (RS) (e.g., such as downlink positioning reference signals DL PRS), uplink (UL) RS, single and multi-cell round trip times (RTT). Other positioning methods such as time difference of arrival (TDoA), reference signal time difference (RSTD), angle of arrival (AoA), angle of departure (AoD), are also used in many communication networks. In general, such positioning methods involve measuring and/or transmitting multiple reference signals from different stations in the communication network (e.g., cells) and then estimating a location for a station (e.g., a user equipment (UE)) based on the signal measurements.

Many mobile devices may be configured to operate with different communication networks and the corresponding technology. In particular, a user equipment (UE) may be configured to operate in different modes based on the capabilities of the UE. For example, the modes may include a LTE standalone (SA) mode, a 5G NR mode, a LTE+Frequency Range 1 (FR1) non-standalone (NSA) mode, a LTE+NR Frequency Range 2 (FR2) mode, a FR1+FR2 dual connectivity (DC) mode, etc. Other modes may also be used by a UE and not all modes are compatible with one another. In prior systems, the network mode selection is based on a user's selection to operate with a preferred technology.

The techniques provided herein enable a UE to measure positioning reference signals in areas with a variety of technologies such as LTE, FR1, FR2 and with different bands and frequencies. In an embodiment, a UE may be configured to receive positioning SIBs (posSIBs) from a network and analyze the cell information contained in the posSIBs to select a mode. For example, the posSIBs may indicate the proximate cells are configured for operation in one or more technologies such as LTE, FR1, and/or FR2 and the UE may select a mode based on the technologies and the capabilities of the UE. These techniques and configurations are examples, and other techniques and configurations may be used.

Referring to FIG. 1 , an example of a communication system 100 includes a UE 105, a Radio Access Network (RAN) 135, here a Fifth Generation (5G) Next Generation (NG) RAN (NG-RAN), and a 5G Core Network (5GC) 140. The UE 105 may be, e.g., an IoT device, a location tracker device, a cellular telephone, or other device. A 5G network may also be referred to as a New Radio (NR) network; NG-RAN 135 may be referred to as a 5G RAN or as an NR RAN; and 5GC 140 may be referred to as an NG Core network (NGC). Standardization of an NG-RAN and 5GC is ongoing in the 3^(rd) Generation Partnership Project (3GPP). Accordingly, the NG-RAN 135 and the 5GC 140 may conform to current or future standards for 5G support from 3GPP. The RAN 135 may be another type of RAN, e.g., a 3G RAN, a 4G Long Term Evolution (LTE) RAN, etc. The communication system 100 may utilize information from a constellation 185 of satellite vehicles (SVs) 190, 191, 192, 193 for a Satellite Positioning System (SPS) (e.g., a Global Navigation Satellite System (GNSS)) like the Global Positioning System (GPS), the Global Navigation Satellite System (GLONASS), Galileo, or Beidou or some other local or regional SPS such as the Indian Regional Navigational Satellite System (IRNSS), the European Geostationary Navigation Overlay Service (EGNOS), or the Wide Area Augmentation System (WAAS). Additional components of the communication system 100 are described below. The communication system 100 may include additional or alternative components.

As shown in FIG. 1 , the NG-RAN 135 includes NR nodeBs (gNBs) 110 a, 110 b, and a next generation eNodeB (ng-eNB) 114, and the 5GC 140 includes an Access and Mobility Management Function (AMF) 115, a Session Management Function (SMF) 117, a Location Management Function (LMF) 120, and a Gateway Mobile Location Center (GMLC) 125. The gNBs 110 a, 110 b and the ng-eNB 114 are communicatively coupled to each other, are each configured to bi-directionally wirelessly communicate with the UE 105, and are each communicatively coupled to, and configured to bi-directionally communicate with, the AMF 115. The AMF 115, the SMF 117, the LMF 120, and the GMLC 125 are communicatively coupled to each other, and the GMLC is communicatively coupled to an external client 130. The SMF 117 may serve as an initial contact point of a Service Control Function (SCF) (not shown) to create, control, and delete media sessions.

FIG. 1 provides a generalized illustration of various components, any or all of which may be utilized as appropriate, and each of which may be duplicated or omitted as necessary. Specifically, although one UE 105 is illustrated, many UEs (e.g., hundreds, thousands, millions, etc.) may be utilized in the communication system 100. Similarly, the communication system 100 may include a larger (or smaller) number of SVs (i.e., more or fewer than the four SVs 190-193 shown), gNBs 110 a, 110 b, ng-eNBs 114, AMFs 115, external clients 130, and/or other components. The illustrated connections that connect the various components in the communication system 100 include data and signaling connections which may include additional (intermediary) components, direct or indirect physical and/or wireless connections, and/or additional networks. Furthermore, components may be rearranged, combined, separated, substituted, and/or omitted, depending on desired functionality.

While FIG. 1 illustrates a 5G-based network, similar network implementations and configurations may be used for other communication technologies, such as 3G, Long Term Evolution (LTE), etc. Implementations described herein (be they for 5G technology and/or for one or more other communication technologies and/or protocols) may be used to transmit (or broadcast) directional synchronization signals, receive and measure directional signals at UEs (e.g., the UE 105) and/or provide location assistance to the UE 105 (via the GMLC 125 or other location server) and/or compute a location for the UE 105 at a location-capable device such as the UE 105, the gNB 110 a, 110 b, or the LMF 120 based on measurement quantities received at the UE 105 for such directionally-transmitted signals. The gateway mobile location center (GMLC) 125, the location management function (LMF) 120, the access and mobility management function (AMF) 115, the SMF 117, the ng-eNB (eNodeB) 114 and the gNBs (gNodeBs) 110 a, 110 b are examples and may, in various embodiments, be replaced by or include various other location server functionality and/or base station functionality respectively.

The UE 105 may comprise and/or may be referred to as a device, a mobile device, a wireless device, a mobile terminal, a terminal, a mobile station (MS), a Secure User Plane Location (SUPL) Enabled Terminal (SET), or by some other name. Moreover, the UE 105 may correspond to a cellphone, smartphone, laptop, tablet, PDA, consumer asset tracking device, navigation device, Internet of Things (IoT) device, asset tracker, health monitors, security systems, smart city sensors, smart meters, wearable trackers, or some other portable or moveable device. Typically, though not necessarily, the UE 105 may support wireless communication using one or more Radio Access Technologies (RATs) such as Global System for Mobile communication (GSM), Code Division Multiple Access (CDMA), Wideband CDMA (WCDMA), LTE, High Rate Packet Data (HRPD), IEEE 802.11 WiFi (also referred to as Wi-Fi), Bluetooth® (BT), Worldwide Interoperability for Microwave Access (WiMAX), 5G new radio (NR) (e.g., using the NG-RAN 135 and the 5GC 140), etc. The UE 105 may support wireless communication using a Wireless Local Area Network (WLAN) which may connect to other networks (e.g., the Internet) using a Digital Subscriber Line (DSL) or packet cable, for example. The use of one or more of these RATs may allow the UE 105 to communicate with the external client 130 (e.g., via elements of the 5GC 140 not shown in FIG. 1 , or possibly via the GMLC 125) and/or allow the external client 130 to receive location information regarding the UE 105 (e.g., via the GMLC 125).

The UE 105 may include a single entity or may include multiple entities such as in a personal area network where a user may employ audio, video and/or data I/O (input/output) devices and/or body sensors and a separate wireline or wireless modem. An estimate of a location of the UE 105 may be referred to as a location, location estimate, location fix, fix, position, position estimate, or position fix, and may be geographic, thus providing location coordinates for the UE 105 (e.g., latitude and longitude) which may or may not include an altitude component (e.g., height above sea level, height above or depth below ground level, floor level, or basement level). Alternatively, a location of the UE 105 may be expressed as a civic location (e.g., as a postal address or the designation of some point or small area in a building such as a particular room or floor). A location of the UE 105 may be expressed as an area or volume (defined either geographically or in civic form) within which the UE 105 is expected to be located with some probability or confidence level (e.g., 67%, 95%, etc.). A location of the UE 105 may be expressed as a relative location comprising, for example, a distance and direction from a known location. The relative location may be expressed as relative coordinates (e.g., X, Y (and Z) coordinates) defined relative to some origin at a known location which may be defined, e.g., geographically, in civic terms, or by reference to a point, area, or volume, e.g., indicated on a map, floor plan, or building plan. In the description contained herein, the use of the term location may comprise any of these variants unless indicated otherwise. When computing the location of a UE, it is common to solve for local x, y, and possibly z coordinates and then, if desired, convert the local coordinates into absolute coordinates (e.g., for latitude, longitude, and altitude above or below mean sea level).

The UE 105 may be configured to communicate with other entities using one or more of a variety of technologies. The UE 105 may be configured to connect indirectly to one or more communication networks via one or more device-to-device (D2D) peer-to-peer (P2P) links. The D2D P2P links may be supported with any appropriate D2D radio access technology (RAT), such as LTE Direct (LTE-D), WiFi Direct (WiFi-D), Bluetooth®, and so on. One or more of a group of UEs utilizing D2D communications may be within a geographic coverage area of a Transmission/Reception Point (TRP) such as one or more of the gNBs 110 a, 110 b, and/or the ng-eNB 114. Other UEs in such a group may be outside such geographic coverage areas, or may be otherwise unable to receive transmissions from a base station. Groups of UEs communicating via D2D communications may utilize a one-to-many (1:M) system in which each UE may transmit to other UEs in the group. A TRP may facilitate scheduling of resources for D2D communications. In other cases, D2D communications may be carried out between UEs without the involvement of a TRP.

Base stations (BSs) in the NG-RAN 135 shown in FIG. 1 include NR Node Bs, referred to as the gNBs 110 a and 110 b. Pairs of the gNBs 110 a, 110 b in the NG-RAN 135 may be connected to one another via one or more other gNBs. Access to the 5G network is provided to the UE 105 via wireless communication between the UE 105 and one or more of the gNBs 110 a, 110 b, which may provide wireless communications access to the 5GC 140 on behalf of the UE 105 using 5G. In FIG. 1 , the serving gNB for the UE 105 is assumed to be the gNB 110 a, although another gNB (e.g. the gNB 110 b) may act as a serving gNB if the UE 105 moves to another location or may act as a secondary gNB to provide additional throughput and bandwidth to the UE 105.

Base stations (BSs) in the NG-RAN 135 shown in FIG. 1 may include the ng-eNB 114, also referred to as a next generation evolved Node B. The ng-eNB 114 may be connected to one or more of the gNBs 110 a, 110 b in the NG-RAN 135, possibly via one or more other gNBs and/or one or more other ng-eNBs. The ng-eNB 114 may provide LTE wireless access and/or evolved LTE (eLTE) wireless access to the UE 105. One or more of the gNBs 110 a, 110 b and/or the ng-eNB 114 may be configured to function as positioning-only beacons which may transmit signals to assist with determining the position of the UE 105 but may not receive signals from the UE 105 or from other UEs.

The BSs 110 a, 110 b, 114 may each comprise one or more TRPs. For example, each sector within a cell of a BS may comprise a TRP, although multiple TRPs may share one or more components (e.g., share a processor but have separate antennas). The system 100 may include macro TRPs or the system 100 may have TRPs of different types, e.g., macro, pico, and/or femto TRPs, etc. A macro TRP may cover a relatively large geographic area (e.g., several kilometers in radius) and may allow unrestricted access by terminals with service subscription. A pico TRP may cover a relatively small geographic area (e.g., a pico cell) and may allow unrestricted access by terminals with service subscription. A femto or home TRP may cover a relatively small geographic area (e.g., a femto cell) and may allow restricted access by terminals having association with the femto cell (e.g., terminals for users in a home).

As noted, while FIG. 1 depicts nodes configured to communicate according to 5G communication protocols, nodes configured to communicate according to other communication protocols, such as, for example, an LTE protocol or IEEE 802.11x protocol, may be used. For example, in an Evolved Packet System (EPS) providing LTE wireless access to the UE 105, a RAN may comprise an Evolved Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access Network (E-UTRAN) which may comprise base stations comprising evolved Node Bs (eNBs). A core network for EPS may comprise an Evolved Packet Core (EPC). An EPS may comprise an E-UTRAN plus EPC, where the E-UTRAN corresponds to the NG-RAN 135 and the EPC corresponds to the 5GC 140 in FIG. 1 .

The gNBs 110 a, 110 b and the ng-eNB 114 may communicate with the AMF 115, which, for positioning functionality, communicates with the LMF 120. The AMF 115 may support mobility of the UE 105, including cell change and handover and may participate in supporting a signaling connection to the UE 105 and possibly data and voice bearers for the UE 105. The LMF 120 may communicate directly with the UE 105, e.g., through wireless communications. The LMF 120 may support positioning of the UE 105 when the UE 105 accesses the NG-RAN 135 and may support position procedures/methods such as Assisted GNSS (A-GNSS), Observed Time Difference of Arrival (OTDOA), Real Time Kinematics (RTK), Precise Point Positioning (PPP), Differential GNSS (DGNSS), Enhanced Cell ID (E-CID), angle of arrival (AOA), angle of departure (AOD), and/or other position methods. The LMF 120 may process location services requests for the UE 105, e.g., received from the AMF 115 or from the GMLC 125. The LMF 120 may be connected to the AMF 115 and/or to the GMLC 125. The LMF 120 may be referred to by other names such as a Location Manager (LM), Location Function (LF), commercial LMF (CLMF), or value added LMF (VLMF). A node/system that implements the LMF 120 may additionally or alternatively implement other types of location-support modules, such as an Enhanced Serving Mobile Location Center (E-SMLC) or a Secure User Plane Location (SUPL) Location Platform (SLP). At least part of the positioning functionality (including derivation of the location of the UE 105) may be performed at the UE 105 (e.g., using signal measurements obtained by the UE 105 for signals transmitted by wireless nodes such as the gNBs 110 a, 110 b and/or the ng-eNB 114, and/or assistance data provided to the UE 105, e.g. by the LMF 120).

The GMLC 125 may support a location request for the UE 105 received from the external client 130 and may forward such a location request to the AMF 115 for forwarding by the AMF 115 to the LMF 120 or may forward the location request directly to the LMF 120. A location response from the LMF 120 (e.g., containing a location estimate for the UE 105) may be returned to the GMLC 125 either directly or via the AMF 115 and the GMLC 125 may then return the location response (e.g., containing the location estimate) to the external client 130. The GMLC 125 is shown connected to both the AMF 115 and LMF 120, though one of these connections may be supported by the 5GC 140 in some implementations.

As further illustrated in FIG. 1 , the LMF 120 may communicate with the gNBs 110 a, 110 b and/or the ng-eNB 114 using a New Radio Position Protocol A (which may be referred to as NPPa or NRPPa), which may be defined in 3GPP Technical Specification (TS) 38.455. NRPPa may be the same as, similar to, or an extension of the LTE Positioning Protocol A (LPPa) defined in 3GPP TS 36.455, with NRPPa messages being transferred between the gNB 110 a (or the gNB 110 b) and the LMF 120, and/or between the ng-eNB 114 and the LMF 120, via the AMF 115. As further illustrated in FIG. 1 , the LMF 120 and the UE 105 may communicate using an LTE Positioning Protocol (LPP), which may be defined in 3GPP TS 36.355. The LMF 120 and the UE 105 may also or instead communicate using a New Radio Positioning Protocol (which may be referred to as NPP or NRPP), which may be the same as, similar to, or an extension of LPP. Here, LPP and/or NPP messages may be transferred between the UE 105 and the LMF 120 via the AMF 115 and the serving gNB 110 a, 110 b or the serving ng-eNB 114 for the UE 105. For example, LPP and/or NPP messages may be transferred between the LMF 120 and the AMF 115 using a 5G Location Services Application Protocol (LCS AP) and may be transferred between the AMF 115 and the UE 105 using a 5G Non-Access Stratum (NAS) protocol. The LPP and/or NPP protocol may be used to support positioning of the UE 105 using UE-assisted and/or UE-based position methods such as A-GNSS, RTK, OTDOA and/or E-CID. The NRPPa protocol may be used to support positioning of the UE 105 using network-based position methods such as E-CID (e.g., when used with measurements obtained by the gNB 110 a, 110 b or the ng-eNB 114) and/or may be used by the LMF 120 to obtain location related information from the gNBs 110 a, 110 b and/or the ng-eNB 114, such as parameters defining directional SS transmissions from the gNBs 110 a, 110 b, and/or the ng-eNB 114.

With a UE-assisted position method, the UE 105 may obtain location measurements and send the measurements to a location server (e.g., the LMF 120) for computation of a location estimate for the UE 105. For example, the location measurements may include one or more of a Received Signal Strength Indication (RSSI), Round Trip signal propagation Time (RTT), Reference Signal Time Difference (RSTD), Reference Signal Received Power (RSRP) and/or Reference Signal Received Quality (RSRQ) for the gNBs 110 a, 110 b, the ng-eNB 114, and/or a WLAN AP. The location measurements may also or instead include measurements of GNSS pseudorange, code phase, and/or carrier phase for the SVs 190-193.

With a UE-based position method, the UE 105 may obtain location measurements (e.g., which may be the same as or similar to location measurements for a UE-assisted position method) and may compute a location of the UE 105 (e.g., with the help of assistance data received from a location server such as the LMF 120 or broadcast by the gNBs 110 a, 110 b, the ng-eNB 114, or other base stations or APs).

With a network-based position method, one or more base stations (e.g., the gNBs 110 a, 110 b, and/or the ng-eNB 114) or APs may obtain location measurements (e.g., measurements of RSSI, RTT, RSRP, RSRQ or Time Of Arrival (TOA) for signals transmitted by the UE 105) and/or may receive measurements obtained by the UE 105. The one or more base stations or APs may send the measurements to a location server (e.g., the LMF 120) for computation of a location estimate for the UE 105.

Information provided by the gNBs 110 a, 110 b, and/or the ng-eNB 114 to the LMF 120 using NRPPa may include timing and configuration information for directional SS transmissions and location coordinates. The LMF 120 may provide some or all of this information to the UE 105 as assistance data in an LPP and/or NPP message via the NG-RAN 135 and the 5GC 140.

An LPP or NPP message sent from the LMF 120 to the UE 105 may instruct the UE 105 to do any of a variety of things depending on desired functionality. For example, the LPP or NPP message could contain an instruction for the UE 105 to obtain measurements for GNSS (or A-GNSS), WLAN, E-CID, and/or OTDOA (or some other position method). In the case of E-CID, the LPP or NPP message may instruct the UE 105 to obtain one or more measurement quantities (e.g., beam ID, beam width, mean angle, RSRP, RSRQ measurements) of directional signals transmitted within particular cells supported by one or more of the gNBs 110 a, 110 b, and/or the ng-eNB 114 (or supported by some other type of base station such as an eNB or WiFi AP). The UE 105 may send the measurement quantities back to the LMF 120 in an LPP or NPP message (e.g., inside a 5G NAS message) via the serving gNB 110 a (or the serving ng-eNB 114) and the AMF 115.

As noted, while the communication system 100 is described in relation to 5G technology, the communication system 100 may be implemented to support other communication technologies, such as GSM, WCDMA, LTE, etc., that are used for supporting and interacting with mobile devices such as the UE 105 (e.g., to implement voice, data, positioning, and other functionalities). In some such embodiments, the 5GC 140 may be configured to control different air interfaces. For example, the 5GC 140 may be connected to a WLAN using a Non-3GPP InterWorking Function (N3IWF, not shown FIG. 1 ) in the 5GC 150. For example, the WLAN may support IEEE 802.11 WiFi access for the UE 105 and may comprise one or more WiFi APs. Here, the N3IWF may connect to the WLAN and to other elements in the 5GC 140 such as the AMF 115. In some embodiments, both the NG-RAN 135 and the 5GC 140 may be replaced by one or more other RANs and one or more other core networks. For example, in an EPS, the NG-RAN 135 may be replaced by an E-UTRAN containing eNBs and the 5GC 140 may be replaced by an EPC containing a Mobility Management Entity (MME) in place of the AMF 115, an E-SMLC in place of the LMF 120, and a GMLC that may be similar to the GMLC 125. In such an EPS, the E-SMLC may use LPPa in place of NRPPa to send and receive location information to and from the eNBs in the E-UTRAN and may use LPP to support positioning of the UE 105. In these other embodiments, positioning of the UE 105 using directional PRSs may be supported in an analogous manner to that described herein for a 5G network with the difference that functions and procedures described herein for the gNBs 110 a, 110 b, the ng-eNB 114, the AMF 115, and the LMF 120 may, in some cases, apply instead to other network elements such eNBs, WiFi APs, an MME, and an E-SMLC.

As noted, in some embodiments, positioning functionality may be implemented, at least in part, using the directional SS beams, sent by base stations (such as the gNBs 110 a, 110 b, and/or the ng-eNB 114) that are within range of the UE whose position is to be determined (e.g., the UE 105 of FIG. 1 ). The UE may, in some instances, use the directional SS beams from a plurality of base stations (such as the gNBs 110 a, 110 b, the ng-eNB 114, etc.) to compute the UE's position.

Referring also to FIG. 2 , a UE 200 is an example of the UE 105 and comprises a computing platform including a processor 210, memory 211 including software (SW) 212, one or more sensors 213, a transceiver interface 214 for a transceiver 215, a user interface 216, a Satellite Positioning System (SPS) receiver 217, a camera 218, and a position (motion) device 219. The processor 210, the memory 211, the sensor(s) 213, the transceiver interface 214, the user interface 216, the SPS receiver 217, the camera 218, and the position (motion) device 219 may be communicatively coupled to each other by a bus 220 (which may be configured, e.g., for optical and/or electrical communication). One or more of the shown apparatus (e.g., the camera 218, the position (motion) device 219, and/or one or more of the sensor(s) 213, etc.) may be omitted from the UE 200. The processor 210 may include one or more intelligent hardware devices, e.g., a central processing unit (CPU), a microcontroller, an application specific integrated circuit (ASIC), etc. The processor 210 may comprise multiple processors including a general-purpose/application processor 230, a Digital Signal Processor (DSP) 231, a modem processor 232, a video processor 233, and/or a sensor processor 234. One or more of the processors 230-234 may comprise multiple devices (e.g., multiple processors). For example, the sensor processor 234 may comprise, e.g., processors for radio ranging, ultrasound, and/or other electronic ranging techniques. The modem processor 232 may support dual SIM/dual connectivity (or even more SIMs). For example, a SIM (Subscriber Identity Module or Subscriber Identification Module) may be used by an Original Equipment Manufacturer (OEM), and another SIM may be used by an end user of the UE 200 for connectivity. The memory 211 is a non-transitory storage medium that may include random access memory (RAM), flash memory, disc memory, and/or read-only memory (ROM), etc. The memory 211 stores the software 212 which may be processor-readable, processor-executable software code containing instructions that are configured to, when executed, cause the processor 210 to perform various functions described herein. Alternatively, the software 212 may not be directly executable by the processor 210 but may be configured to cause the processor 210, e.g., when compiled and executed, to perform the functions. The description may refer to the processor 210 performing a function, but this includes other implementations such as where the processor 210 executes software and/or firmware. The description may refer to the processor 210 performing a function as shorthand for one or more of the processors 230-234 performing the function. The description may refer to the UE 200 performing a function as shorthand for one or more appropriate components of the UE 200 performing the function. The processor 210 may include a memory with stored instructions in addition to and/or instead of the memory 211. Functionality of the processor 210 is discussed more fully below.

The configuration of the UE 200 shown in FIG. 2 is an example and not limiting of the disclosure, including the claims, and other configurations may be used. For example, an example configuration of the UE includes one or more of the processors 230-234 of the processor 210, the memory 211, and the wireless transceiver 240. Other example configurations include one or more of the processors 230-234 of the processor 210, the memory 211, the wireless transceiver 240, and one or more of the sensor(s) 213, the user interface 216, the SPS receiver 217, the camera 218, the PMD 219, and/or the wired transceiver 250.

The UE 200 may comprise the modem processor 232 that may be capable of performing baseband processing of signals received and down-converted by the transceiver 215 and/or the SPS receiver 217. The modem processor 232 may perform baseband processing of signals to be upconverted for transmission by the transceiver 215. Also or alternatively, baseband processing may be performed by the processor 230 and/or the DSP 231. Other configurations, however, may be used to perform baseband processing.

The UE 200 may include the sensor(s) 213 that may include, for example, an Inertial Measurement Unit (IMU) 270, one or more magnetometers 271, and/or one or more environment sensors 272. The IMU 270 may comprise one or more inertial sensors, for example, one or more accelerometers 273 (e.g., collectively responding to acceleration of the UE 200 in three dimensions) and/or one or more gyroscopes 274. The magnetometer(s) may provide measurements to determine orientation (e.g., relative to magnetic north and/or true north) that may be used for any of a variety of purposes, e.g., to support one or more compass applications. The environment sensor(s) 272 may comprise, for example, one or more temperature sensors, one or more barometric pressure sensors, one or more ambient light sensors, one or more camera imagers, and/or one or more microphones, etc. The sensor(s) 213 may generate analog and/or digital signals indications of which may be stored in the memory 211 and processed by the DSP 231 and/or the processor 230 in support of one or more applications such as, for example, applications directed to positioning and/or navigation operations.

The sensor(s) 213 may be used in relative location measurements, relative location determination, motion determination, etc. Information detected by the sensor(s) 213 may be used for motion detection, relative displacement, dead reckoning, sensor-based location determination, and/or sensor-assisted location determination. The sensor(s) 213 may be useful to determine whether the UE 200 is fixed (stationary) or mobile and/or whether to report certain useful information to the LMF 120 regarding the mobility of the UE 200. For example, based on the information obtained/measured by the sensor(s) 213, the UE 200 may notify/report to the LMF 120 that the UE 200 has detected movements or that the UE 200 has moved, and report the relative displacement/distance (e.g., via dead reckoning, or sensor-based location determination, or sensor-assisted location determination enabled by the sensor(s) 213). In another example, for relative positioning information, the sensors/IMU can be used to determine the angle and/or orientation of the other device with respect to the UE 200, etc.

The IMU 270 may be configured to provide measurements about a direction of motion and/or a speed of motion of the UE 200, which may be used in relative location determination. For example, the one or more accelerometers 273 and/or the one or more gyroscopes 274 of the IMU 270 may detect, respectively, a linear acceleration and a speed of rotation of the UE 200. The linear acceleration and speed of rotation measurements of the UE 200 may be integrated over time to determine an instantaneous direction of motion as well as a displacement of the UE 200. The instantaneous direction of motion and the displacement may be integrated to track a location of the UE 200. For example, a reference location of the UE 200 may be determined, e.g., using the SPS receiver 217 (and/or by some other means) for a moment in time and measurements from the accelerometer(s) 273 and gyroscope(s) 274 taken after this moment in time may be used in dead reckoning to determine present location of the UE 200 based on movement (direction and distance) of the UE 200 relative to the reference location.

The magnetometer(s) 271 may determine magnetic field strengths in different directions which may be used to determine orientation of the UE 200. For example, the orientation may be used to provide a digital compass for the UE 200. The magnetometer(s) 271 may include a two-dimensional magnetometer configured to detect and provide indications of magnetic field strength in two orthogonal dimensions. Also or alternatively, the magnetometer(s) 271 may include a three-dimensional magnetometer configured to detect and provide indications of magnetic field strength in three orthogonal dimensions. The magnetometer(s) 271 may provide means for sensing a magnetic field and providing indications of the magnetic field, e.g., to the processor 210.

The transceiver 215 may include a wireless transceiver 240 and a wired transceiver 250 configured to communicate with other devices through wireless connections and wired connections, respectively. For example, the wireless transceiver 240 may include a transmitter 242 and receiver 244 coupled to one or more antennas 246 for transmitting (e.g., on one or more uplink channels and/or one or more sidelink channels) and/or receiving (e.g., on one or more downlink channels and/or one or more sidelink channels) wireless signals 248 and transducing signals from the wireless signals 248 to wired (e.g., electrical and/or optical) signals and from wired (e.g., electrical and/or optical) signals to the wireless signals 248. Thus, the transmitter 242 may include multiple transmitters that may be discrete components or combined/integrated components, and/or the receiver 244 may include multiple receivers that may be discrete components or combined/integrated components. The wireless transceiver 240 may be configured to communicate signals (e.g., with TRPs and/or one or more other devices) according to a variety of radio access technologies (RATs) such as 5G New Radio (NR), GSM (Global System for Mobiles), UMTS (Universal Mobile Telecommunications System), AMPS (Advanced Mobile Phone System), CDMA (Code Division Multiple Access), WCDMA (Wideband CDMA), LTE (Long-Term Evolution), LTE Direct (LTE-D), 3GPP LTE-V2X (PC5), V2C (Uu), IEEE 802.11 (including IEEE 802.11p), WiFi, WiFi Direct (WiFi-D), Bluetooth®, Zigbee etc. NR systems may be configured to operate on different frequency layers such as FR1 (e.g., 410-7125 MHz) and FR2 (e.g., 24.25-52.6 GHz), and may extend into new bands such as sub-6 GHz and/or 100 GHz and higher (e.g., FR2x, FR3, FR4). The wired transceiver 250 may include a transmitter 252 and a receiver 254 configured for wired communication, e.g., with the network 135 to send communications to, and receive communications from, the gNB 110 a, for example. The transmitter 252 may include multiple transmitters that may be discrete components or combined/integrated components, and/or the receiver 254 may include multiple receivers that may be discrete components or combined/integrated components. The wired transceiver 250 may be configured, e.g., for optical communication and/or electrical communication. The transceiver 215 may be communicatively coupled to the transceiver interface 214, e.g., by optical and/or electrical connection. The transceiver interface 214 may be at least partially integrated with the transceiver 215.

The user interface 216 may comprise one or more of several devices such as, for example, a speaker, microphone, display device, vibration device, keyboard, touch screen, etc. The user interface 216 may include more than one of any of these devices. The user interface 216 may be configured to enable a user to interact with one or more applications hosted by the UE 200. For example, the user interface 216 may store indications of analog and/or digital signals in the memory 211 to be processed by DSP 231 and/or the general-purpose processor 230 in response to action from a user. Similarly, applications hosted on the UE 200 may store indications of analog and/or digital signals in the memory 211 to present an output signal to a user. The user interface 216 may include an audio input/output (I/O) device comprising, for example, a speaker, a microphone, digital-to-analog circuitry, analog-to-digital circuitry, an amplifier and/or gain control circuitry (including more than one of any of these devices). Other configurations of an audio I/O device may be used. Also or alternatively, the user interface 216 may comprise one or more touch sensors responsive to touching and/or pressure, e.g., on a keyboard and/or touch screen of the user interface 216.

The SPS receiver 217 (e.g., a Global Positioning System (GPS) receiver) may be capable of receiving and acquiring SPS signals 260 via an SPS antenna 262. The antenna 262 is configured to transduce the wireless signals 260 to wired signals, e.g., electrical or optical signals, and may be integrated with the antenna 246. The SPS receiver 217 may be configured to process, in whole or in part, the acquired SPS signals 260 for estimating a location of the UE 200. For example, the SPS receiver 217 may be configured to determine location of the UE 200 by trilateration using the SPS signals 260. The general-purpose processor 230, the memory 211, the DSP 231 and/or one or more specialized processors (not shown) may be utilized to process acquired SPS signals, in whole or in part, and/or to calculate an estimated location of the UE 200, in conjunction with the SPS receiver 217. The memory 211 may store indications (e.g., measurements) of the SPS signals 260 and/or other signals (e.g., signals acquired from the wireless transceiver 240) for use in performing positioning operations. The general-purpose processor 230, the DSP 231, and/or one or more specialized processors, and/or the memory 211 may provide or support a location engine for use in processing measurements to estimate a location of the UE 200.

The UE 200 may include the camera 218 for capturing still or moving imagery. The camera 218 may comprise, for example, an imaging sensor (e.g., a charge coupled device or a CMOS imager), a lens, analog-to-digital circuitry, frame buffers, etc. Additional processing, conditioning, encoding, and/or compression of signals representing captured images may be performed by the general-purpose processor 230 and/or the DSP 231. Also or alternatively, the video processor 233 may perform conditioning, encoding, compression, and/or manipulation of signals representing captured images. The video processor 233 may decode/decompress stored image data for presentation on a display device (not shown), e.g., of the user interface 216.

The position (motion) device (PMD) 219 may be configured to determine a position and possibly motion of the UE 200. For example, the PMD 219 may communicate with, and/or include some or all of, the SPS receiver 217. The PMD 219 may also or alternatively be configured to determine location of the UE 200 using terrestrial-based signals (e.g., at least some of the signals 248) for trilateration, for assistance with obtaining and using the SPS signals 260, or both. The PMD 219 may be configured to use one or more other techniques (e.g., relying on the UE's self-reported location (e.g., part of the UE's position beacon)) for determining the location of the UE 200, and may use a combination of techniques (e.g., SPS and terrestrial positioning signals) to determine the location of the UE 200. The PMD 219 may include one or more of the sensors 213 (e.g., gyroscope(s), accelerometer(s), magnetometer(s), etc.) that may sense orientation and/or motion of the UE 200 and provide indications thereof that the processor 210 (e.g., the processor 230 and/or the DSP 231) may be configured to use to determine motion (e.g., a velocity vector and/or an acceleration vector) of the UE 200. The PMD 219 may be configured to provide indications of uncertainty and/or error in the determined position and/or motion.

Referring also to FIG. 3 , an example of a TRP 300 of the BSs 110 a, 110 b, 114 comprises a computing platform including a processor 310, memory 311 including software (SW) 312, a transceiver 315, and (optionally) an SPS receiver 317. The processor 310, the memory 311, the transceiver 315, and the SPS receiver 317 may be communicatively coupled to each other by a bus 320 (which may be configured, e.g., for optical and/or electrical communication). One or more of the shown apparatus (e.g., a wireless interface and/or the SPS receiver 317) may be omitted from the TRP 300. The SPS receiver 317 may be configured similarly to the SPS receiver 217 to be capable of receiving and acquiring SPS signals 360 via an SPS antenna 362. The processor 310 may include one or more intelligent hardware devices, e.g., a central processing unit (CPU), a microcontroller, an application specific integrated circuit (ASIC), etc. The processor 310 may comprise multiple processors (e.g., including a general-purpose/application processor, a DSP, a modem processor, a video processor, and/or a sensor processor as shown in FIG. 2 ). The memory 311 is a non-transitory storage medium that may include random access memory (RAM)), flash memory, disc memory, and/or read-only memory (ROM), etc. The memory 311 stores the software 312 which may be processor-readable, processor-executable software code containing instructions that are configured to, when executed, cause the processor 310 to perform various functions described herein. Alternatively, the software 312 may not be directly executable by the processor 310 but may be configured to cause the processor 310, e.g., when compiled and executed, to perform the functions. The description may refer to the processor 310 performing a function, but this includes other implementations such as where the processor 310 executes software and/or firmware. The description may refer to the processor 310 performing a function as shorthand for one or more of the processors contained in the processor 310 performing the function. The description may refer to the TRP 300 performing a function as shorthand for one or more appropriate components of the TRP 300 (and thus of one of the BSs 110 a, 110 b, 114) performing the function. The processor 310 may include a memory with stored instructions in addition to and/or instead of the memory 311. Functionality of the processor 310 is discussed more fully below.

The transceiver 315 may include a wireless transceiver 340 and a wired transceiver 350 configured to communicate with other devices through wireless connections and wired connections, respectively. For example, the wireless transceiver 340 may include a transmitter 342 and receiver 344 coupled to one or more antennas 346 for transmitting (e.g., on one or more uplink channels) and/or receiving (e.g., on one or more downlink channels) wireless signals 348 and transducing signals from the wireless signals 348 to wired (e.g., electrical and/or optical) signals and from wired (e.g., electrical and/or optical) signals to the wireless signals 348. Thus, the transmitter 342 may include multiple transmitters that may be discrete components or combined/integrated components, and/or the receiver 344 may include multiple receivers that may be discrete components or combined/integrated components. The wireless transceiver 340 may be configured to communicate signals (e.g., with the UE 200, one or more other UEs, and/or one or more other devices) according to a variety of radio access technologies (RATs) such as 5G New Radio (NR), GSM (Global System for Mobiles), UMTS (Universal Mobile Telecommunications System), AMPS (Advanced Mobile Phone System), CDMA (Code Division Multiple Access), WCDMA (Wideband CDMA), LTE (Long-Term Evolution), LTE Direct (LTE-D), 3GPP LTE-V2X (PC5), IEEE 802.11 (including IEEE 802.11p), WiFi, WiFi Direct (WiFi-D), Bluetooth®, Zigbee etc. The wired transceiver 350 may include a transmitter 352 and a receiver 354 configured for wired communication, e.g., with the network 140 to send communications to, and receive communications from, the LMF 120 or other network server, for example. The transmitter 352 may include multiple transmitters that may be discrete components or combined/integrated components, and/or the receiver 354 may include multiple receivers that may be discrete components or combined/integrated components. The wired transceiver 350 may be configured, e.g., for optical communication and/or electrical communication.

The configuration of the TRP 300 shown in FIG. 3 is an example and not limiting of the disclosure, including the claims, and other configurations may be used. For example, the description herein discusses that the TRP 300 is configured to perform or performs several functions, but one or more of these functions may be performed by the LMF 120 and/or the UE 200 (i.e., the LMF 120 and/or the UE 200 may be configured to perform one or more of these functions).

Referring also to FIG. 4 , an example server, such as the LMF 120, comprises a computing platform including a processor 410, memory 411 including software (SW) 412, and a transceiver 415. The processor 410, the memory 411, and the transceiver 415 may be communicatively coupled to each other by a bus 420 (which may be configured, e.g., for optical and/or electrical communication). One or more of the shown apparatus (e.g., a wireless interface) may be omitted from the server 400. The processor 410 may include one or more intelligent hardware devices, e.g., a central processing unit (CPU), a microcontroller, an application specific integrated circuit (ASIC), etc. The processor 410 may comprise multiple processors (e.g., including a general-purpose/application processor, a DSP, a modem processor, a video processor, and/or a sensor processor as shown in FIG. 2 ). The memory 411 is a non-transitory storage medium that may include random access memory (RAM)), flash memory, disc memory, and/or read-only memory (ROM), etc. The memory 411 stores the software 412 which may be processor-readable, processor-executable software code containing instructions that are configured to, when executed, cause the processor 410 to perform various functions described herein. Alternatively, the software 412 may not be directly executable by the processor 410 but may be configured to cause the processor 410, e.g., when compiled and executed, to perform the functions. The description may refer to the processor 410 performing a function, but this includes other implementations such as where the processor 410 executes software and/or firmware. The description may refer to the processor 410 performing a function as shorthand for one or more of the processors contained in the processor 410 performing the function. The description may refer to the server 400 (or the LMF 120) performing a function as shorthand for one or more appropriate components of the server 400 performing the function. The processor 410 may include a memory with stored instructions in addition to and/or instead of the memory 411. Functionality of the processor 410 is discussed more fully below.

The transceiver 415 may include a wireless transceiver 440 and a wired transceiver 450 configured to communicate with other devices through wireless connections and wired connections, respectively. For example, the wireless transceiver 440 may include a transmitter 442 and receiver 444 coupled to one or more antennas 446 for transmitting (e.g., on one or more downlink channels) and/or receiving (e.g., on one or more uplink channels) wireless signals 448 and transducing signals from the wireless signals 448 to wired (e.g., electrical and/or optical) signals and from wired (e.g., electrical and/or optical) signals to the wireless signals 448. Thus, the transmitter 442 may include multiple transmitters that may be discrete components or combined/integrated components, and/or the receiver 444 may include multiple receivers that may be discrete components or combined/integrated components. The wireless transceiver 440 may be configured to communicate signals (e.g., with the UE 200, one or more other UEs, and/or one or more other devices) according to a variety of radio access technologies (RATs) such as 5G New Radio (NR), GSM (Global System for Mobiles), UMTS (Universal Mobile Telecommunications System), AMPS (Advanced Mobile Phone System), CDMA (Code Division Multiple Access), WCDMA (Wideband CDMA), LTE (Long-Term Evolution), LTE Direct (LTE-D), 3GPP LTE-V2X (PC5), IEEE 802.11 (including IEEE 802.11p), WiFi, WiFi Direct (WiFi-D), Bluetooth®, Zigbee etc. The wired transceiver 450 may include a transmitter 452 and a receiver 454 configured for wired communication, e.g., with the network 135 to send communications to, and receive communications from, the TRP 300, for example. The transmitter 452 may include multiple transmitters that may be discrete components or combined/integrated components, and/or the receiver 454 may include multiple receivers that may be discrete components or combined/integrated components. The wired transceiver 450 may be configured, e.g., for optical communication and/or electrical communication.

The configuration of the server 400 shown in FIG. 4 is an example and not limiting of the disclosure, including the claims, and other configurations may be used. For example, the wireless transceiver 440 may be omitted. Also or alternatively, the description herein discusses that the server 400 is configured to perform or performs several functions, but one or more of these functions may be performed by the TRP 300 and/or the UE 200 (i.e., the TRP 300 and/or the UE 200 may be configured to perform one or more of these functions).

Referring to FIGS. 5A and 5B, example downlink PRS resource sets are shown. In general, a PRS resource set is a collection of PRS resources across one base station (e.g., TRP 300) which have the same periodicity, a common muting pattern configuration and the same repetition factor across slots. A first PRS resource set 502 includes 4 resources and a repetition factor of 4, with a time-gap equal to 1 slot. A second PRS resource set 504 includes 4 resources and a repetition factor of 4 with a time-gap equal to 4 slots. The repetition factor indicates the number of times each PRS resource is repeated in each single instance of the PRS resource set (e.g., values of 1, 2, 4, 6, 8, 16, 32). The time-gap represents the offset in units of slots between two repeated instances of a PRS resource corresponding to the same PRS resource ID within a single instance of the PRS resource set (e.g., values of 1, 2, 4, 8, 16, 32). The time duration spanned by one PRS resource set containing repeated PRS resources does not exceed PRS-periodicity. The repetition of a PRS resource enables receiver beam sweeping across repetitions and combining RF gains to increase coverage. The repetition may also enable intra-instance muting.

Referring to FIG. 6 , example subframe and slot formats for positioning reference signal transmissions are shown. The example subframe and slot formats are included in the PRS resource sets depicted in FIGS. 5A and 5B. The subframes and slot formats in FIG. 6 are examples and not limitations and include a comb-2 with 2 symbols format 602, a comb-4 with 4 symbols format 604, a comb-2 with 12 symbols format 606, a comb-4 with 12 symbols format 608, a comb-6 with 6 symbols format 610, a comb-12 with 12 symbols format 612, a comb-2 with 6 symbols format 614, and a comb-6 with 12 symbols format 616. In general, a subframe may include 14 symbol periods with indices 0 to 13. The subframe and slot formats may be used for a Physical Broadcast Channel (PBCH). Typically, a base station may transmit the PRS from antenna port 6 on one or more slots in each subframe configured for PRS transmission. The base station may avoid transmitting the PRS on resource elements allocated to the PBCH, a primary synchronization signal (PSS), or a secondary synchronization signal (SSS) regardless of their antenna ports. The cell may generate reference symbols for the PRS based on a cell ID, a symbol period index, and a slot index. Generally, a UE may be able to distinguish the PRS from different cells.

A base station may transmit the PRS over a particular PRS bandwidth, which may be configured by higher layers. The base station may transmit the PRS on subcarriers spaced apart across the PRS bandwidth. The base station may also transmit the PRS based on the parameters such as PRS periodicity TPRS, subframe offset PRS, and PRS duration NPRS. PRS periodicity is the periodicity at which the PRS is transmitted. The PRS periodicity may be, for example, 160, 320, 640 or 1280 ms. Subframe offset indicates specific subframes in which the PRS is transmitted. And PRS duration indicates the number of consecutive subframes in which the PRS is transmitted in each period of PRS transmission (PRS occasion). The PRS duration may be, for example, 1, 2, 4 or 6 ms.

The PRS periodicity TPRS and the subframe offset PRS may be conveyed via a PRS configuration index IPRS. The PRS configuration index and the PRS duration may be configured independently by higher layers. A set of NPRS consecutive subframes in which the PRS is transmitted may be referred to as a PRS occasion. Each PRS occasion may be enabled or muted, for example, the UE may apply a muting bit to each cell. A PRS resource set is a collection of PRS resources across a base station which have the same periodicity, a common muting pattern configuration, and the same repetition factor across slots (e.g., 1, 2, 4, 6, 8, 16, 32 slots).

In general, the PRS resources depicted in FIGS. 5A and 5B may be a collection of resource elements that are used for transmission of PRS. The collection of resource elements can span multiple physical resource blocks (PRBs) in the frequency domain and N (e.g., 1 or more) consecutive symbol(s) within a slot in the time domain. In a given OFDM symbol, a PRS resource occupies consecutive PRBs. A PRS resource is described by at least the following parameters: PRS resource identifier (ID), sequence ID, comb size-N, resource element offset in the frequency domain, starting slot and starting symbol, number of symbols per PRS resource (i.e., the duration of the PRS resource), and QCL information (e.g., QCL with other DL reference signals). Currently, one antenna port is supported. The comb size indicates the number of subcarriers in each symbol carrying PRS. For example, a comb-size of comb-4 means that every fourth subcarrier of a given symbol carries PRS.

A PRS resource set is a set of PRS resources used for the transmission of PRS signals, where each PRS resource has a PRS resource ID. In addition, the PRS resources in a PRS resource set are associated with the same transmission-reception point (e.g., a TRP 300). Each of the PRS resources in the PRS resource set have the same periodicity, a common muting pattern, and the same repetition factor across slots. A PRS resource set is identified by a PRS resource set ID and may be associated with a particular TRP (identified by a cell ID) transmitted by an antenna panel of a base station. A PRS resource ID in a PRS resource set may be associated with an omnidirectional signal, and/or with a single beam (and/or beam ID) transmitted from a single base station (where a base station may transmit one or more beams). Each PRS resource of a PRS resource set may be transmitted on a different beam and as such, a PRS resource, or simply resource can also be referred to as a beam. Note that this does not have any implications on whether the base stations and the beams on which PRS are transmitted are known to the UE.

Referring to FIG. 7 , a conceptual diagram of an example frequency layer 700 is shown. In an example, the frequency layer 700 also referred to as a positioning frequency layer, may be a collection of PRS resource sets across one or more TRPs. The positioning frequency layer may have the same subcarrier spacing (SCS) and cyclic prefix (CP) type, the same point-A, the same value of DL PRS Bandwidth, the same start PRB, and the same value of comb-size. The numerologies supported for PDSCH may be supported for PRS. Each of the PRS resource sets in the frequency layer 700 is a collection of PRS resources across one TRP which have the same periodicity, a common muting pattern configuration, and the same repetition factor across slots.

Note that the terms positioning reference signal and PRS are reference signals that can be used for positioning, such as but not limited to, PRS signals, navigation reference signals (NRS) in 5G, downlink position reference signals (DL-PRS), uplink position reference signals (UL-PRS), tracking reference signals (TRS), cell-specific reference signals (CRS), channel state information reference signals (CSI-RS), primary synchronization signals (PSS), secondary synchronization signals (SSS), sounding reference signals (SRS), etc.

The ability of a UE to process PRS signals may vary based on the capabilities of the UE. In general, however, industry standards may be developed to establish a common PRS capability for UEs in a network. For example, an industry standard may require that a duration of DL PRS symbol in units of milliseconds (ms) a UE can process every T ms assuming a maximum DL PRS bandwidth in MHz, which is supported and reported by UE. As examples, and not limitations, the maximum DL PRS bandwidth for the FR1 bands may be 5, 10, 20, 40, 50, 80, 100 MHz, and for the FR2 bands may be 50, 100, 200, 400 MHz. The standards may also indicate a DL PRS buffering capability as a Type 1 (i.e., sub-slot/symbol level buffering), or a Type 2 (i.e., slot level buffering). The common UE capabilities may indicate a duration of DL PRS symbols N in units of ms a UE can process every T ms assuming maximum DL PRS bandwidth in MHz, which is supported and reported by a UE. Example T values may include 8, 16, 20, 30, 40, 80, 160, 320, 640, 1280 ms, and example N values may include 0.125, 0.25, 0.5, 1, 2, 4, 6, 8, 12, 16, 20, 25, 30, 32, 35, 40, 45, 50 ms. A UE may be configured to report a combination of (N, T) values per band, where N is a duration of DL PRS symbols in ms processed every T ms for a given maximum bandwidth (B) in MHz supported by a UE. In general, a UE may not be expected to support a DL PRS bandwidth that exceeds the reported DL PRS bandwidth value. The UE DL PRS processing capability may be defined for a single positioning frequency layer 700. The UE DL PRS processing capability may be agnostic to DL PRS comb factor configurations such as depicted in FIG. 6 . The UE processing capability may indicate a maximum number of DL PRS resources that a UE can process in a slot under it. For example, the maximum number for FR1 bands may be 1, 2, 4, 6, 8, 12, 16, 24, 32, 48, 64 for each SCS: 15 kHz, 30 kHz, 60 kHz, and the maximum number for the FR2 bands may be 1, 2, 4, 6, 8, 12, 16, 24, 32, 48, 64 for each SCS: 15 kHz, 30 kHz, 60 kHz, 120 kHz.

Referring to FIG. 8 , an example message flow 800 for time of arrival (ToA) based position flow between a user equipment 805 and a plurality of base stations is shown. The UE 805 is an example of the UE 105, 200 and a first base station 810, a second base station 812 and a third base station 814 are examples of a gNB 110 a-b or ng-eNB 114. The number of base stations and message formats in the message flow 800 are examples and not limitations as other numbers and formats may be used. ToA based positioning methods utilize the precise measurements of the arrival time of signals transmitted from one or more base stations to a user equipment, or vice versa. For example, the first base station 810 may be configured to transmit a first DL PRS 802 at time T1, the second base station 812 may be configured to transmit a second DL PRS 804 at time T1, and the third base station 814 may be configured to transmit a third DL PRS 806 at time T1. The transmit times and signal format are examples to describe the concepts of ToA lateration techniques. The distance between the UE 805 and the respective base stations 810, 812, 814 is based on the propagation time of the respective PRS signals 802, 804, 806. That is, the signals travel with a known velocity (e.g., approximately the speed of light (c) or ˜300 meters per microsecond), and the distance can be determined from the elapsed propagation time. ToA based positioning requires precise knowledge of the transmission start time(s), and that all stations are accurately synchronized with a precise time source. Using the propagation speed and measured time, a distance (D) between the UE 805 and respective base station may be expressed as: D=c*(t)  (1) where:

-   -   D=distance (meters);     -   c=propagation speed of ˜300 meters/microsecond;     -   t=time in microseconds.

For example, the distance between the UE 805 and the first base station 810 is c*(T2−T1), the distance between the UE 805 and the second base station 812 is c*(T3−T1), and the distance between the UE 805 and the third base station 814 is c*(T4−T1). The stations may use other transmission times (i.e., not all stations must transmit at time T1). Using the respective distances as a radius, a circular representation of the area around the base stations may be used to determine a position estimate for the UE 805 (e.g., using trilateration). Additional stations may be used (e.g., using multi-lateration techniques). ToA positioning methods may be used for two-dimensional as well as three-dimensional position estimates. Three-dimensional resolution can be performed by constructing spherical instead of circular models.

A drawback of ToA positioning methods is the requirement for precise time synchronization of all stations. Even small issues with time synchronization may result in very large errors in the resulting positioning estimates. Other positioning techniques, such as round trip timing (RTT) and Angle of Arrival (AoA) are less dependent on station time synchronization.

Referring to FIG. 9 , an example round trip message flow 900 between a user equipment 905 and a base station 910 is shown. The UE 905 is an example of the UE 105, 200 and the base station 910 may be a gNB 110 a-b or ng-eNB 114. In general, RTT positioning methods utilize a time for a signal to travel from one entity to another and back to determine a range between the two entities. The range, plus a known location of a first one of the entities and an angle between the two entities (e.g., an azimuth angle) can be used to determine a location of the second of the entities. In multi-RTT (also called multi-cell RTT), multiple ranges from one entity (e.g., a UE) to other entities (e.g., TRPs) and known locations of the other entities may be used to determine the location of the one entity. The example message flow 900 may be initiated by the base station 910 with a RTT session configured message 902. The base station may utilize the LPP/NRPPa messaging to configure the RTT session. At time T1, the base station 910 may transmit a DL PRS 904, which is received by the UE 905 at time T2. In response, the UE 905 may transmit a Sounding Reference Signal (SRS) for positioning message 906 at time T3 which is received by the base station 910 at time T4. The SRS may also be a UL PRS. The distance between the UE 905 and the base station 910 may be computed as:

$\begin{matrix} {{distance} = {\frac{c}{2}\left( {\left( {{T4} - {T1}} \right) - \left( {{T3} - {T2}} \right)} \right)}} & (2) \end{matrix}$

-   -   where c=speed of light.

Since the UE 905 and base station 910 are exchanging messages, which may include timing information, the impact of a timing offset between the stations may be minimized. That is, the RTT procedures may be used in asynchronous networks. A drawback to RTT procedures, however, is that in dense operating environments, where there are many UEs exchanging RTT messages with base stations, the bandwidth required for the UL SRS for positioning messages may increase the messaging overhead and utilize excess network bandwidth. In this use case, passive positioning techniques may reduce the bandwidth required for positioning by eliminating transmissions from the UE.

Referring to FIG. 10 , an example message flow 1000 for passive positioning of a user equipment 1005 is shown. The message flow includes the UE 1005, a first base station 1010 and a second base station 1012. The UE 1005 is an example of the UEs 105, 200, and the base stations 1010, 1012 are examples of the gNBs 110 a-b or ng-eNB 114. In general, TDOA positioning techniques utilize the difference in travel times between one entity and other entities to determine relative ranges from the other entities and those, combined with known locations of the other entities, may be used to determine the location of the one entity. Angles of arrival and/or departure may be used to help determine a location of an entity. For example, an angle of arrival or an angle of departure of a signal combined with a range between devices (determined using signal, e.g., a travel time of the signal, a received power of the signal, etc.) and a known location of one of the devices may be used to determine a location of the other device. The angle of arrival or departure may be an azimuth angle relative to a reference direction such as true north. The angle of arrival or departure may be a zenith angle relative to directly upward from an entity (i.e., relative to radially outward from a center of Earth). In operation, the first base station 1010 may provide a passive positioning start message 1002 to the UE 1005. The passive positioning start message 1002 may be a broadcast message, or other signaling such as Radio Resource Control (RRC), to inform the UE of a PRS transmission schedule and may include transmission information (e g, channel information, muting patterns, PRS bandwidth, PRS identification information, etc.). At time T1, the first station may transmit a first DL PRS 1004 which may be received by the second base station 1012 at time T2 (for example), and by the UE 1005 at time T3. The second base station 1012 may be configured to transmit a second DL PRS 1006 at time T4, which is received by the first base station 1010 at time T5 and by the UE 1005 at time T6. The time between T2 and T4 may be a configured turnaround time on the second base station 1012 and thus a known period of time. The time between T1 and T2 (i.e., time of flight) may also be known because the first and second base stations 1010, 1012 are in fixed locations. The turnaround time (i.e., T4−T2) and the time of flight (i.e., T2−T1) may be broadcast or otherwise provided to the UE 1005 for use in positioning calculations. The UE 1005 may observe the difference between T6 and T3, and the distances may be computed as:

$\begin{matrix} {D_{{{gNB}1} - {UE}} = {\frac{c}{2}\left( \left( {T_{3} - T_{1}} \right) \right)}} & (3) \end{matrix}$ $\begin{matrix} {D_{{{gNB}2} - {UE}} = {{\frac{c}{2}\left( {\left( {T_{6} - T_{1}} \right) - \left( {T_{4} - T_{2}} \right) - \left( {T_{2} - T_{1}} \right)} \right)} = {\frac{c}{2}\left( {T_{6} - T_{4}} \right)}}} & (4) \end{matrix}$ $\begin{matrix} {{D_{{{gNB}2} - {UE}} - D_{{{gNB}1} - {UE}}} = {\frac{c}{2}\left( {\left( {T_{6} - T_{3}} \right) - \left( {T_{4} - T_{2}} \right) - \left( {T_{2} - T_{1}} \right)} \right)}} & (5) \end{matrix}$

In operation, in an example, the base stations 1010, 1012 may utilize synchronized timing to compute the time of flight values. In an example, the first DL PRS 1004 and the second DL PRS 1006 may include timing information (such as in the RTT message flow 900) and thus may reduce the impact of a timing offset between the stations.

Referring to FIG. 11 , a timing diagram 1100 of an example measurement gap is shown. Measurement gaps may be used by the UE 200 to perform measurements which cannot be accomplished while the UE 200 is communicating with a serving cell. During the measurement gap, the uplink and downlink data transfers are interrupted. The UE 200 may use the measurement gaps for PRS and RRM measurements. In LTE systems, the measurement gaps may be used for inter-frequency and inter-system measurements. The measurement gaps provide additional time to allow the UE 200 to re-tune its transceiver to the target band (e.g., carrier), obtain measurements, and then re-tune the transceiver back to the original carrier. The re-tuning operations may require up to 0.5 ms. In NR systems, the measurement gaps may be used for intra-frequency measurements, in addition to inter-frequency and inter-system measurements. A NR UE may be configured to utilize bandwidth parts (BWPs). In an example, the UE may be configured with an active BWP which does not contain the intra-frequency SS/PBCH block, and the UE may have to re-tune its transceiver to receive the intra-frequency SS/PBCH block. A base station, such as the gNBs 110 a-b and the ng-eNB 114, may be configured to generate and provide measurement gap information to the UEs. For example, the base station may transmit measurement gap configuration information elements such as a measurement gap offset (MGO) 1104 which can be measured from a frame or subframe boundary 1102. A measurement gap length (MGL) 1106 indicates the duration of a measurement gap. The MGL 1106 is typically in a range of 1.5 to 6 ms. The measurement gap repetition period (MGRP) 1108 defines the period between consecutive measurement gaps. 3GPP TS 38.133 specifies gap patterns based on combinations of the MGL 1106 and the MGRP 1108. For example, the MGL 1106 values may vary from 1.5 to 6 ms, and the MGRP 1108 values may vary from 20 to 160 ms. The MGL 1106 may be further limited to accommodate UE tuning times. The measurement gap information may be exchanged via Radio Resource Control (RRC) signaling, or via other network interfaces. In general, NR communication system utilize two type of measurement gaps. In a perUE measurement gap, a gap pattern is per UE and common to FR1/LTE/FR2. In a perFR measurement gap, the network may configured independent measurement gaps for LTE/FR1 and FR2 when a target UE has independent measurement capability for FR1/LTE and FR2. In operation, the use of measurement gaps in the UE may create latency in positioning processes and thus it may be preferable for a UE to select reference signals and technologies to reduce the number of measurement gaps.

Referring to FIG. 12 , a conceptual diagram 1200 of network mode selection based on positioning system information blocks is shown. The diagram 1200 includes a UE 1205 which may include some or all of the components of the UE 200, and the UE 200 may be an example of the UE 1205. The diagram 1200 includes four example base stations including a first base station 1202, a second base station 1204, a third base station 1206 and a fourth base station 1208. Each of the base stations 1202, 1204, 1206, 1208 may include one or more of the components of the TRP 300, and the TRP 300 may be an example of a base station. The first base station 1202 operates within the NR FR1 technology and is configured to transmit one or more DL PRS 1202 a via the NR FR1 technology. The second base station 1204 operates within the NR FR2 technology and is configured to transmit one or more DL PRS 1204 a via the NR FR2 technology. The third base station 1206 operates within the LTE technology and is configured to transmit one or more DL PRS 1206 a via the LTE technology. The fourth base station 1208 operates within the NR FR1 technology and is configured to transmit one or more DL PRS 1208 a via the NR FR1 technology.

The first base station 1202 may be a serving cell and configured to broadcast one or more SIBs, including one or more posSIBs 1210, to a coverage area. The posSIBs 1210 include positioning assistance data, and the UE 1205 is configured to receive the posSIBs 1210 via network messaging protocols such as RRC. In an embodiment, the UE 1205 may be configured to receive posSIBs broadcast from one or more other capable base stations (e.g., one or more of the base stations 1204, 1208). The posSIBs 1210 may be configured to provide assistance data for a range of positioning reference signal based methods such as OTDOA, NR DL-TDOA/DL AoD and RTT, for example. The posSIBS 1210 may also contain an indication of the technologies, frequencies and bandwidths associated with one or more of the DL PRS the UE 1205 may receive.

The UE 1205 may be configured to operate in multiple network modes such as a LTE/NR-FR1/NR-FR2 network mode and a NR-FR1/LTE network mode. While in the LTE/NR-FR1/NR-FR2 network mode, the UE 1205 may operate in LTE+FR1 EN-DC (i.e., E-UTRA/NR Dual Connectivity) or in LTE+FR2 EN-DC (see for example 3GPP TS 37.340, rev. 15). While in the NR-FR1/LTE network mode, the UE 1205 may operate in NR-FR1 SA mode or NR-FR1+LTE NE-DC (i.e., NR-E-UTRA Dual Connectivity, see for example 3GPP TS 37.340, rev. 15).

In general, the network modes of a UE may enable support for various non-standalone and EN-DC combinations. Example combinations may include LTE and NR bands. For example, B3+N78 EN-DC, B3+N41 EN-DC, B3+N260 EN-DC, N66+N260 FR1−FR2 DC, etc. Thus, if a UE is in a mode capable of receiving signals via B3 and N78, the UE may measure all cells in the received assistance data in the B3 and/or N78 bands without the need of a measurement gap.

In operation, the UE 1205 may determine the technologies and frequencies associated with the DL PRS 1202 a, 1204 a, 1206 a, 1208 a, and then select a network mode based on the capabilities of the UE 1205 and a performance requirement. For example, the UE 1205 may select a network mode to reduce the number of measurement gaps required to measure the DL PRS. The UE 1205 may select a network mode based on thermal constraints (i.e., to avoid energizing additional processor stacks to receive the DL PRS). The UE 1205 may select a network mode based on multiple subscriber identity module (MSIM) configurations. That is, the network mode and the corresponding DL PRS may be selected to reduce conflicts between subscriptions. Other operational constraints may also be used.

Referring to FIG. 13 , with further reference to FIGS. 1-12 , a method 1300 for positioning a mobile device with network mode selection includes the stages shown. The method 1300 is, however, an example and not limiting. The method 1300 may be altered, e.g., by having stages added, removed, rearranged, combined, performed concurrently, and/or having single stages split into multiple stages. For example, determining a location at stage 1312 is optional as a remote server may be configured to determine a location based on measurements received from a mobile device.

At stage 1302, the method includes receiving one or more system information blocks containing positioning reference signal information. The UE 200 is a means for receiving the posSIBs. In an example, one or more base stations may broadcast posSIBs via RRC or other network messaging protocols to UEs in a coverage area. The posSIBs may include assistance data with PRS resource information, such as an indication of the PRS resources in a frequency layer depicted in FIG. 7 , and may include cell information and the technology (e.g., LTE, FR1, FR2) and associated band/frequency (e.g., B3, N78, N66, N260, etc.) of each of the respective PRS resources.

At stage 1304, the method includes determining band and frequency information for positioning reference signals based on the one or more system information blocks. The UE 200 is a means for determining the band and frequency information. The posSIBs received at stage 1302 may provide PRS information for a plurality of base stations, and the PRS may be transmitted on different bands/frequencies associated with a technology (e.g., LTE, FR1, FR2). The UE 200 may be configured to parse the information elements in the posSIBs to determine the band and frequency information and to determine the associated technology.

At stage 1306, the method includes determining at least one operational constraint for a user equipment. The UE 200 is a means for determining operational constraints. Example operational constraints may be to reduce the number of measurement gaps required for PRS based positioning, to reduce the thermal load on the UE during PRS positioning, and/or to reduce conflicts in MSIM modes. In an example, one operational constraint may be selected and other constraints may be ignored. Multiple operational constraints may be used. In an example, the operational constraints may be based on a default priority (e.g., reduce measurement gaps, then reduce thermal load, then reduce MSIM conflicts). In an example, a user may be configured to select operational constraints and/or provide priority information to enable a UE to select preferred operational constraint(s). In general, an operational constraint may be used to prioritize the selection of different network mode options if multiple options are available.

At stage 1308, the method includes determining a network mode for the user equipment based at least on the band and frequency information and the at least one operational constraint. The UE 200 is a means for determining a network mode. In an example, the network mode may be selected to reduce the number of measurement gaps utilized to measure the DL PRS. The process flow in FIGS. 14A and 14B is an example method for selecting a network mode to reduce measurement gaps. Other operational constraints such as thermal load and MSIM conflicts may also be used independently or in combination to select a network mode. For example, to avoid overheating or in view of other thermal constraints, the UE 200 may select a network mode such that at least some of the PRS identified in the posSIBs may be measured without initializing additional processor capabilities (e.g., stacks) associated with another technology. That is, in general, if a UE selects a network mode preference of LTE+FR1, then to measure FR2 cells the UE will also require LTE+FR1+FR2 stacks to be operational during the measurement period which may have a significant impact to thermal conditions of the UE. Thus, in such cases, the UE may utilize the LTE/NR-FR1 mode and ignore the FR2 PRS. In MSIM mode, radio frequency/base band (RF/BB) capabilities of a UE are shared between the two subscriptions. In certain cases, the UE may be required to share the signal path between the two subscriptions such as in Data and IDLE scenarios, where RF chains of the data subscription may need to be tuned away for the IDLE subscription page decode. In such cases, the UE may have a conflict between the measurements of the one subscription and positioning related measurements on the other subscription. This may lead to page decode performance degradation or higher position fix uncertainty depending on which is prioritized. In this scenario, a knowledge of a requirement of the other subscription may be used to determine the network mode preference of the connected subscription. For example, the second subscription is in IDLE on LTE, then to measure FR1 cells, having a network mode preference of FR1 is preferable to utilizing a LTE network mode. Other constraints may be used to select a network mode in view of the PRS information in the one or more posSIBs.

At stage 1310, the method includes measuring one or more positioning reference signals based at least in part on the network mode. The UE 200 is a means for measuring one or more PRSs. In an example, the UE 200 may utilize the PRS transmitted on a band or on band combinations which are compatible with the network mode. For example, when the UE 200 is in a LTE+FR1 EN-DC mode, the UE 200 may receive PRS on a specific band combination such as with the B3 and N78 bands. Other sets of band combinations may also be configured. In this example, the UE 200 may receive the PRS without the need for measurement gaps. The measurements may include a value such as ToA, TDoA, RSTD, RTT, RSSI, or AoA previously described. In general, the measurement values may be used to determine lines of position or ranges relative to the stations transmitting the PRS.

At stage 1312, the method optionally includes determining a location of the user equipment based at least in part on the measurements associated with the one or more positioning reference signals. The UE 200 or a server 400 may be a means for determining the location. In an example, the UE 200 may receive assistance data including location information associated with the transmitting stations and the UE 200 may be configured to determine a location based on the measured ranges and/or bearings to the transmitting stations (e.g., multilateration). In an example, the UE 200 may provide the measurement values obtained at stage 1310 to a network server such as the LMF 120. The network server may be configured to perform the positioning calculations and provide the resulting location information to the UE 200 and/or to other network entities.

Referring to FIGS. 14A and 14B, with further reference to FIGS. 1-13 , a method 1400 for network mode selection based on positioning system information blocks includes the stages shown. The method 1400 is, however, an example and not limiting. The method 1400 may be altered, e.g., by having stages added, removed, rearranged, combined, performed concurrently, and/or having single stages split into multiple stages. The UE 200 is a means for implementing the method 1400.

At stage 1402, the method includes determining band and frequency parameters for one or more positioning reference signals. The UE 200 may receive assistance data via one or more posSIBs transmitted from one or more network stations. For example, the UE 1205 in FIG. 12 is configured to receive the posSIBs 1210 from the first base station 1202. The assistance data within the posSIBs may include band and frequency parameters for PRS transmitted by network stations. The UE 200 may also determine the technologies (e.g., LTE, FR1, FR2) associated with the PRS. The technology and band/frequency parameters may be used to determine which network mode the UE 200 will utilize for a positioning session.

At stage 1404, the method includes determining what technology a majority of the band and frequency parameters are associated with. In an example, based on the determination that most or all the cells in broadcasted assistance data included in the posSIBs belongs to FR1 as compared to LTE, then at stage 1406 the UE 200 is configured to either change the network mode preference to NR(FR1) at stage 1408 if the UE 200 does not support EN-DC because it would otherwise need to create measurement objects to measure all the cells on NR FR1 from LTE. Conversely, if the UE 200 supports EN-DC, then the network mode may be set to LTE/NR-FR1 at stage 1410 and then select LTE cells based on the band and frequency in which most of the NR cells in the assistance data may be measured without the requirement of a measurement gap due to support of concurrent bands (e.g., when the UE 200 is configured to support certain bands and frequencies concurrently).

In an example, if the determination at stage 1404 is that most or all the cells in the broadcasted assistance data included in the posSIB belong to LTE as compared to NR-FR1, then at stage 1412 UE 200 may be configured to either change the network mode preference to LTE at stage 1414 if the UE 200 does not support NE-DC because otherwise LTE cells cannot be measured without a measurement gap. If the UE 200 supports NE-DC at stage 1412, then the UE 200 may be configured to use the mode preference as NR at stage 1416 and set the network mode to NR and select cells that can be measured with the least number of measurement gaps.

In an example, if the determination at stage 1404 is that most or all the cells in the broadcasted assistance data included in the posSIBs belongs to NR-FR2 as compared to NR-FR1 or LTE, then the UE 200 may be configured to set the network mode to NR-FR1 at stage 1422 if the UE 200 supports FR1+FR2 DC at stage 1420. Else, the UE 200 may use the network mode preference as LTE at stage 1426 if the UE 200 supports LTE+FR2 EN-DC at stage 1420.

The UE 200 may utilize the network mode at FR1 at stage 1424 if the UE supports FR1+FR2 DC at stage 1420 with FR1 being the band in which a majority of the cells in the assistance data are included. This may allow the UE 200 to select a band for measuring the one or more positioning reference signals based at least in part on a number of measurement gaps associated with the band, such that the selected band has a fewer number of measurement gaps as compared to other possible bands. For example, the UE 200 may measure FR2 along with FR1 with the least number of measurement gaps. The UE 200 may prefer LTE as the network mode preference at stage 1428 if the UE 200 supports LTE+FR2 EN-DC with LTE being the band in which a majority of the cells in the assistance data are included. This may allow the UE 200 to measure FR2 along with LTE cells with the least number of measurement gaps.

In an example, if the UE 200 indicates a ‘PerFR’ gap capability, and the network is configuring the UE 200 with gap-FR1 and gap-FR2, then the UE 200 may prefer a FR1/other technologies network mode preference over LTE/other technologies network mode preference since the UE 200 may be able to independently measure on FR1 and FR2 with the least number of measurement gaps.

Other examples and implementations are within the scope of the disclosure and appended claims. For example, due to the nature of software and computers, functions described above can be implemented using software executed by a processor, hardware, firmware, hardwiring, or a combination of any of these. Features implementing functions may also be physically located at various positions, including being distributed such that portions of functions are implemented at different physical locations. For example, one or more functions, or one or more portions thereof, discussed above as occurring in the LMF 120 may be performed outside of the LMF 120 such as by the TRP 300.

As used herein, the singular forms “a,” “an,” and “the” include the plural forms as well, unless the context clearly indicates otherwise. For example, “a processor” may include one processor or multiple processors. The terms “comprises,” “comprising,” “includes,” and/or “including,” as used herein, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.

Also, as used herein, “or” as used in a list of items prefaced by “at least one of” or prefaced by “one or more of” indicates a disjunctive list such that, for example, a list of “at least one of A, B, or C,” or a list of “one or more of A, B, or C” means A or B or C or AB or AC or BC or ABC (i.e., A and B and C), or combinations with more than one feature (e.g., AA, AAB, ABBC, etc.).

Substantial variations may be made in accordance with specific requirements. For example, customized hardware might also be used, and/or particular elements might be implemented in hardware, software (including portable software, such as applets, etc.) executed by a processor, or both. Further, connection to other computing devices such as network input/output devices may be employed.

The systems and devices discussed above are examples. Various configurations may omit, substitute, or add various procedures or components as appropriate. For instance, features described with respect to certain configurations may be combined in various other configurations. Different aspects and elements of the configurations may be combined in a similar manner. Also, technology evolves and, thus, many of the elements are examples and do not limit the scope of the disclosure or claims.

A wireless communication system is one in which communications are conveyed wirelessly, i.e., by electromagnetic and/or acoustic waves propagating through atmospheric space rather than through a wire or other physical connection. A wireless communication network may not have all communications transmitted wirelessly, but is configured to have at least some communications transmitted wirelessly. Further, the term “wireless communication device,” or similar term, does not require that the functionality of the device is exclusively, or evenly primarily, for communication, or that the device be a mobile device, but indicates that the device includes wireless communication capability (one-way or two-way), e.g., includes at least one radio (each radio being part of a transmitter, receiver, or transceiver) for wireless communication.

Specific details are given in the description to provide a thorough understanding of example configurations (including implementations). However, configurations may be practiced without these specific details. For example, well-known circuits, processes, algorithms, structures, and techniques have been shown without unnecessary detail in order to avoid obscuring the configurations. This description provides example configurations, and does not limit the scope, applicability, or configurations of the claims. Rather, the preceding description of the configurations provides a description for implementing described techniques. Various changes may be made in the function and arrangement of elements without departing from the scope of the disclosure.

The terms “processor-readable medium,” “machine-readable medium,” and “computer-readable medium,” as used herein, refer to any medium that participates in providing data that causes a machine to operate in a specific fashion. Using a computing platform, various processor-readable media might be involved in providing instructions/code to processor(s) for execution and/or might be used to store and/or carry such instructions/code (e.g., as signals). In many implementations, a processor-readable medium is a physical and/or tangible storage medium. Such a medium may take many forms, including but not limited to, non-volatile media and volatile media. Non-volatile media include, for example, optical and/or magnetic disks. Volatile media include, without limitation, dynamic memory.

A statement that a value exceeds (or is more than or above) a first threshold value is equivalent to a statement that the value meets or exceeds a second threshold value that is slightly greater than the first threshold value, e.g., the second threshold value being one value higher than the first threshold value in the resolution of a computing system. A statement that a value is less than (or is within or below) a first threshold value is equivalent to a statement that the value is less than or equal to a second threshold value that is slightly lower than the first threshold value, e.g., the second threshold value being one value lower than the first threshold value in the resolution of a computing system.

Implementation examples are described in the following numbered clauses:

1. A method for measuring positioning reference signals with a user equipment, comprising:

receiving one or more system information blocks containing positioning reference signal information;

determining band and frequency information for positioning reference signals based on the one or more system information blocks;

determining at least one operational constraint for the user equipment;

determining a network mode for the user equipment based at least on the band and frequency information and the at least one operational constraint; and

measuring one or more positioning reference signals based at least in part on the network mode.

2. The method of clause 1 further comprising determining a location of the user equipment based at least in part on measurements associated with the one or more positioning reference signals.

3. The method of clause 2 wherein determining the location of the user equipment includes providing measurements associated with the one or more positioning reference signals to a network server.

4. The method of clause 1 wherein the at least one operational constraint is based on a number of measurement gaps required to measure the one or more positioning reference signals.

5. The method of clause 1 wherein the at least one operational constraint is based on a thermal constraint associated with utilizing additional processor power to measure the one or more positioning reference signals.

6. The method of clause 1 wherein the at least one operational constraint is based on a conflict between functions associated with two different subscriptions in a multiple subscriber identity module (MSIM) mode.

7. The method of clause 1 wherein measuring the one or more positioning reference signals includes measuring a first positioning reference signal from a first base station and measuring a second positioning reference signal from a second base station wherein the first positioning reference signal and the second positioning reference signal are in different frequency bands.

8. The method of clause 7 wherein the first base station utilizes a first technology and the second base station utilizes a second technology that is different from the first technology.

9. The method of clause 8 wherein the first technology is Long Term Evolution and the second technology is New Radio Frequency Range 1.

10. The method of clause 1 wherein determining the network mode for the user equipment includes selecting a band for measuring the one or more positioning reference signals based at least in part on a number of measurement gaps associated with the band, wherein the selected band has a fewer number of measurement gaps as compared to other possible bands.

11. The method of clause 1 wherein determining the network mode for the user equipment includes setting the network mode to Long Term Evolution or New Radio Frequency Range 1 if the user equipment supports Evolved Universal Mobile Telecommunications System Terrestrial Radio Access and New Radio Dual Connectivity.

12. The method of clause 1 wherein determining the network mode for the user equipment includes setting the network mode to New Radio Frequency Range 1 if the user equipment does not supports Evolved Universal Mobile Telecommunications System Terrestrial Radio Access and New Radio Dual Connectivity.

13. The method of clause 1 wherein determining the network mode for the user equipment includes setting the network mode to New Radio if the user equipment supports New Radio Evolved Universal Mobile Telecommunications System Terrestrial Radio Access Dual Connectivity.

14. The method of clause 1 wherein determining the network mode for the user equipment includes setting the network mode to Long Term Evolution if the user equipment does not supports New Radio Evolved Universal Mobile Telecommunications System Terrestrial Radio Access Dual Connectivity.

15. The method of clause 1 wherein determining the network mode for the user equipment includes setting the network mode to Long Term Evolution or New Radio Frequency Range 1 if the user equipment supports New Radio Frequency Range 1 and New Radio Frequency Range 2 Dual Connectivity.

16. The method of clause 1 wherein determining the network mode for the user equipment includes setting the network mode to Long Term Evolution if the user equipment supports Long Term Evolution Frequency Range 2 Evolved Universal Mobile Telecommunications System Terrestrial Radio Access and New Radio Dual Connectivity.

17. An apparatus, comprising:

a memory;

at least one transceiver;

at least one processor communicatively coupled to the memory and the at least one transceiver, and configured to:

receive one or more system information blocks containing positioning reference signal information;

determine band and frequency information for positioning reference signals based on the one or more system information blocks;

determine at least one operational constraint;

determine a network mode based at least on the band and frequency information and the at least one operational constraint; and

measure one or more positioning reference signals based at least in part on the network mode.

18. The apparatus of clause 17 wherein the at least one processor is further configured to determine a location based at least in part on measurements associated with the one or more positioning reference signals.

19. The apparatus of clause 17 wherein the at least one processor is further configured to provide measurements associated with the one or more positioning reference signals to a network server.

20. The apparatus of clause 17 wherein the at least one operational constraint is based on a number of measurement gaps required to measure the one or more positioning reference signals.

21. The apparatus of clause 17 wherein the at least one operational constraint is based on a thermal constraint associated with utilizing additional processor power to measure the one or more positioning reference signals.

22. The apparatus of clause 17 wherein the at least one operational constraint is based on a conflict between functions associated with two different subscriptions in a multiple subscriber identity module (MSIM) mode.

23. The apparatus of clause 17 wherein the at least one processor is further configured to measure a first positioning reference signal from a first base station and measure a second positioning reference signal from a second base station wherein the first positioning reference signal and the second positioning reference signal are in different frequency bands.

24. The apparatus of clause 23 wherein the first base station utilizes a first technology and the second base station utilizes a second technology that is different from the first technology.

25. The apparatus of clause 24 wherein the first technology is Long Term Evolution and the second technology is New Radio Frequency Range 1.

26. The apparatus of clause 17 wherein the at least one processor is further configured to determine a band for measuring the one or more positioning reference signals.

27. The apparatus of clause 17 wherein the at least one processor is further configured to set the network mode to Long Term Evolution or New Radio Frequency Range 1 if the user equipment supports Evolved Universal Mobile Telecommunications System Terrestrial Radio Access and New Radio Dual Connectivity.

28. The apparatus of clause 17 wherein the at least one processor is further configured to set the network mode to New Radio Frequency Range 1 if the apparatus does not supports Evolved Universal Mobile Telecommunications System Terrestrial Radio Access and New Radio Dual Connectivity.

29. An apparatus for measuring positioning reference signals with a user equipment, comprising:

means for receiving one or more system information blocks containing positioning reference signal information;

means for determining band and frequency information for positioning reference signals based on the one or more system information blocks;

means for determining at least one operational constraint for the user equipment;

means for determining a network mode for the user equipment based at least on the band and frequency information and the at least one operational constraint; and

means for measuring one or more positioning reference signals based at least in part on the network mode.

30. A non-transitory processor-readable storage medium comprising processor-readable instructions configured to cause one or more processors to measure positioning reference signals with a user equipment, comprising:

code for receiving one or more system information blocks containing positioning reference signal information;

code for determining band and frequency information for positioning reference signals based on the one or more system information blocks;

code for determining at least one operational constraint for the user equipment;

code for determining a network mode for the user equipment based at least on the band and frequency information and the at least one operational constraint; and

code for measuring one or more positioning reference signals based at least in part on the network mode. 

The invention claimed is:
 1. A method for measuring positioning reference signals with a user equipment, comprising: receiving one or more system information blocks containing positioning reference signal information; determining band and frequency information for positioning reference signals based on the one or more system information blocks; determining at least one operational constraint for the user equipment; determining a network mode for the user equipment based at least on the band and frequency information and the at least one operational constraint; and measuring one or more positioning reference signals based at least in part on the network mode.
 2. The method of claim 1 further comprising determining a location of the user equipment based at least in part on measurements associated with the one or more positioning reference signals.
 3. The method of claim 2 wherein determining the location of the user equipment includes providing measurements associated with the one or more positioning reference signals to a network server.
 4. The method of claim 1 wherein the at least one operational constraint is based on a number of measurement gaps required to measure the one or more positioning reference signals.
 5. The method of claim 1 wherein the at least one operational constraint is based on a thermal constraint associated with utilizing additional processor power to measure the one or more positioning reference signals.
 6. The method of claim 1 wherein the at least one operational constraint is based on a conflict between functions associated with two different subscriptions in a multiple subscriber identity module (MSIM) mode.
 7. The method of claim 1 wherein measuring the one or more positioning reference signals includes measuring a first positioning reference signal from a first base station and measuring a second positioning reference signal from a second base station wherein the first positioning reference signal and the second positioning reference signal are in different frequency bands.
 8. The method of claim 7 wherein the first base station utilizes a first technology and the second base station utilizes a second technology that is different from the first technology.
 9. The method of claim 8 wherein the first technology is Long Term Evolution and the second technology is New Radio Frequency Range
 1. 10. The method of claim 1 wherein determining the network mode for the user equipment includes selecting a band for measuring the one or more positioning reference signals based at least in part on a number of measurement gaps associated with the band, wherein the selected band has a fewer number of measurement gaps as compared to other possible bands.
 11. The method of claim 1 wherein determining the network mode for the user equipment includes setting the network mode to Long Term Evolution or New Radio Frequency Range 1 if the user equipment supports Evolved Universal Mobile Telecommunications System Terrestrial Radio Access and New Radio Dual Connectivity.
 12. The method of claim 1 wherein determining the network mode for the user equipment includes setting the network mode to New Radio Frequency Range 1 if the user equipment does not supports Evolved Universal Mobile Telecommunications System Terrestrial Radio Access and New Radio Dual Connectivity.
 13. The method of claim 1 wherein determining the network mode for the user equipment includes setting the network mode to New Radio if the user equipment supports New Radio Evolved Universal Mobile Telecommunications System Terrestrial Radio Access Dual Connectivity.
 14. The method of claim 1 wherein determining the network mode for the user equipment includes setting the network mode to Long Term Evolution if the user equipment does not supports New Radio Evolved Universal Mobile Telecommunications System Terrestrial Radio Access Dual Connectivity.
 15. The method of claim 1 wherein determining the network mode for the user equipment includes setting the network mode to Long Term Evolution or New Radio Frequency Range 1 if the user equipment supports New Radio Frequency Range 1 and New Radio Frequency Range 2 Dual Connectivity.
 16. The method of claim 1 wherein determining the network mode for the user equipment includes setting the network mode to Long Term Evolution if the user equipment supports Long Term Evolution Frequency Range 2 Evolved Universal Mobile Telecommunications System Terrestrial Radio Access and New Radio Dual Connectivity.
 17. An apparatus, comprising: a memory; at least one transceiver; at least one processor communicatively coupled to the memory and the at least one transceiver, and configured to: receive one or more system information blocks containing positioning reference signal information; determine band and frequency information for positioning reference signals based on the one or more system information blocks; determine at least one operational constraint; determine a network mode based at least on the band and frequency information and the at least one operational constraint; and measure one or more positioning reference signals based at least in part on the network mode.
 18. The apparatus of claim 17 wherein the at least one processor is further configured to determine a location based at least in part on measurements associated with the one or more positioning reference signals.
 19. The apparatus of claim 17 wherein the at least one processor is further configured to provide measurements associated with the one or more positioning reference signals to a network server.
 20. The apparatus of claim 17 wherein the at least one operational constraint is based on a number of measurement gaps required to measure the one or more positioning reference signals.
 21. The apparatus of claim 17 wherein the at least one operational constraint is based on a thermal constraint associated with utilizing additional processor power to measure the one or more positioning reference signals.
 22. The apparatus of claim 17 wherein the at least one operational constraint is based on a conflict between functions associated with two different subscriptions in a multiple subscriber identity module (MSIM) mode.
 23. The apparatus of claim 17 wherein the at least one processor is further configured to measure a first positioning reference signal from a first base station and measure a second positioning reference signal from a second base station wherein the first positioning reference signal and the second positioning reference signal are in different frequency bands.
 24. The apparatus of claim 23 wherein the first base station utilizes a first technology and the second base station utilizes a second technology that is different from the first technology.
 25. The apparatus of claim 24 wherein the first technology is Long Term Evolution and the second technology is New Radio Frequency Range
 1. 26. The apparatus of claim 17 wherein the at least one processor is further configured to determine a band for measuring the one or more positioning reference signals.
 27. The apparatus of claim 17 wherein the at least one processor is further configured to set the network mode to Long Term Evolution or New Radio Frequency Range 1 if the user equipment supports Evolved Universal Mobile Telecommunications System Terrestrial Radio Access and New Radio Dual Connectivity.
 28. The apparatus of claim 17 wherein the at least one processor is further configured to set the network mode to New Radio Frequency Range 1 if the apparatus does not supports Evolved Universal Mobile Telecommunications System Terrestrial Radio Access and New Radio Dual Connectivity.
 29. An apparatus for measuring positioning reference signals with a user equipment, comprising: means for receiving one or more system information blocks containing positioning reference signal information; means for determining band and frequency information for positioning reference signals based on the one or more system information blocks; means for determining at least one operational constraint for the user equipment; means for determining a network mode for the user equipment based at least on the band and frequency information and the at least one operational constraint; and means for measuring one or more positioning reference signals based at least in part on the network mode.
 30. A non-transitory processor-readable storage medium comprising processor-readable instructions configured to cause one or more processors to measure positioning reference signals with a user equipment, comprising: code for receiving one or more system information blocks containing positioning reference signal information; code for determining band and frequency information for positioning reference signals based on the one or more system information blocks; code for determining at least one operational constraint for the user equipment; code for determining a network mode for the user equipment based at least on the band and frequency information and the at least one operational constraint; and code for measuring one or more positioning reference signals based at least in part on the network mode. 